This is his blog article. https://mikekaganski.wordpress.com/2025/07/25/microsoft-anybody-home/
Looking at this, it looks more like Microsoft just screwed it's auth system in some way for him then intentionally banned him in particular.
I as an IT guy have seen this before SOHO office accounts as well and entirely agree that MS has entirely lost the ability to do IT infrastructure in any useful way. Even at an enterprise level, Exchange and outlook used to be convoluted to learn and administer before they became cloud based, as regedit was your friend and they always buried the settings. Now, it doesn't require a degree in IT, but rather a pointy hat and a reading of spell books to make things work... Sometimes. Sacrifices of interns might be necessary at the alter of Support, before they'll answer the phone and you realize they have no more knowledge then you to.
Agreed, but let's not be naïve. Pay them a food wage, give them healthcare, and good incentives to be ethnical government workers. If you don't, then the corruption gets worse under the table.